Detachable base stapling machine



Feb. 12, 1957 w. G. PANKONIN 2,780,809

DETACHABLE BASE STAPLING MACHINE Filed Jan. 25, 1955 INVENTOR. W\LL\AMG. PANKOMN .gwkwwui A-r-romqsv DETACHABLE BASE STAPLKNG MACHINE WilliamG. Pankonin, Chicago, 11L, assignor to Triangle Tool & ManufacturingCompany, Chicago, 1111., a corporation of Illinois 1 Application January25, 1955, Serial No. 483,867

4 Claims. (Cl. 1-3) This invention relates to improvements in desk typestapling machines having the staple driving mechanism detachable fromthe base for use as a tacker.

Stapling machines of this type are shown in William G. Pankonin Patents2,056,480 for Stapling Device issued October 6, 1936, and 2,059,021 forStapling Machine issued October 27, 1938. The detaching means of thefirst mentioned patent is not readily discernible to the average user ofthe stapling machine and hence this usage of the machine is oftenforgotten. Such means also requires careful registration for reassembly.The detaching means of the second mentioned patent does not provide asuiiiciently positive position to maintain the essential accuratealinement between the driving blade of the staple driving mechanism andthe clinching anvil on the base.

It is the object of this invention, therefore, to provide an easilydiscernible, simply operated, positive alining means for detachablymounting the staple driving mechanism to the base, which is alsoinexpensive to manufacture.

To accomplish this, a mounting member is permanently pivoted to the basefor limited movement with respect thereto. Such member is spring biasedto maintain the staple driving mechanism in raised position. Elements onsuch member and mechanism interengage to provide positive alinement ofthe mechanism with such permanent pivot and a frictional lock holds saidmechanism in such positive position. Disengagement is accomplished bymerely swinging the staple driving mechanism up beyond the upper limitof the swing of said member. This separates both the frictional lock andalining elements. Reengagement is accomplished by seating one set ofsuch elements and swinging the locking mechanism down to the lower limitof said member. This cams in the other set of elements to make positivealinement and engages the frictional lock to maintain such alinementduring normal use as a staple driving and clinching mechanism.

The features of the invention which are considered new and useful and,therefore, patentable are set forth in the claims below. The details ofan embodiment of the invention can best be understood from the followingspecification and the drawings, in which:

Fig. l is a view in side elevation of a stapling machine embodying thepresent invention;

Fig. 2 is an enlarged fragmentary top plan view of the means fordetachably mounting the staple driving mechanism to the anvil carryingbase;

Fig. 3 is an enlarged fragmentary top plan view similar to that shown inFig. 2 with the staple driving mechanism removed;

Fig. 4 is an enlarged fragmentary sectional view taken on the line 4-4of Fig. 1;

Fig. 5 is an enlarged fragmentary sectional view taken on the line 5-5of Fig. 1;

Fig. 6 is an enlarged fragmentary sectional view taken on the line 66 ofFig. 1; and

Fig. 7 is a fragmentary view in side elevation showing the stapledriving mechanism disengaged from the supire porting base, parts beingshown in section for clarity in illustration.

The invention shown in the drawings is incorporated in a staplingmachine of usual design including an anvil carrying base it to which thestaple driving mechanism 12 is pivotally mounted when the machine isused to drive staples through material and clinch the legs of suchstaples. The staple driving blade must be maintained in close alinementwith clinching cavities in the anvil or improper functioning willresult. it is also desirable to resiliently hold the driving mechanismraised as shown in Fig. 1 to permit ready insertion of material to bestapled. To accomplish these purposes, elongated sides 14 of themagazine of the driving mechanism are temporarily locked between sides16 of a mounting member 18 permanently pivoted to the base 18. The sides16 are interconnected and held by two spaced braces 19 and 21transversely extending between the lower edges of such sides and make arigid open top receptacle. The mounting member 18 is permanently pivotedbetween wings 20 struck up from the base it) by a pin 22 secured to suchwings and passing through holes 24 in tabs 26 depending from the sides16.

The upward movement (counter-clockwise as viewed in Figs. 1 and 7) ofmember 18 is limited by the engagement between its left lower corner andthe top of the base iii to an angle of about 25 from the base. Themember id is normally resiliently held with its right end spaced fromthe base, as shown in Figs. 1 and 7, by a riser 28 pivoted on the pin 22and swingable within the limits created by the positioning of the sidesof a notch 30 on opposite sides of the base ltl (see Fig. 7). Lateraldisplacement of such riser may be restrained by projections 32 whichoverlap the sides of the riser 23. A coiled compression spring 34 heldby centering fingers 36 and 38 on the base and riser resilientlymaintains the riser in such raised position.

The sides 14 of the staple driving mechanism have rearwardly andupwardly opening notches 40 into which will slide studs 42 projectinginwardly from the sides 16 as the staple driving mechanism 12 is movedlongitudinally in between the sides 16 while tilted at an angle, in theneighborhood of 45, with respect to the base. No accuracy is needed tomake this jointure fit. The left lower corners of the sides 14 will beguided by the brace 19 so that the openings to the notches 40 will beautomatically alined with the studs 42. Additional guiding may beobtained by providing slopes 44 on the ends of the sides 14 from whichthe notches 40 recede.

With the notches 4b fully seated on the studs 42, the staple drivingmechanism is swung clockwise downwardly with respect to the member 13until pimples 46 on the inner surfaces of the sides 16 near the front(tight) ends thereof frictionally seat in holes 48 in the side 16. Thefrictional engagement thus established will be sufficient to lock thestaple driving mechanism 12 in the mounting member 18 so that suchmechanism will be guided by such member with the staple driver inalinement with the clinching anvil.

In order to assist in seating the pimples 46 in the holes .8 and also toassure positive alinement between mechanism and holding member, thesides 14 have downwardly opening notches St the mouths of which straddlestuds 52 on the inner faces of the sides 16 as the mechanism is swungdownwardly in the seating action. Such engagement positivelylongitudinally alines the sides 14 with the sides 16 and hence insuresthat the staple driving mechanism will always seat in the samerelationship to the pivot 32 and remain in proper alinement with theanvil. The rear edges (left) of the notches 56 may be convexly curvedabout the center of the circular end of the notches 44? thus providingwith the notches 40 proper carnming surfaces which closely andpositively engage the spaced studs from opposite directions. Anyinaccuracy in the fit between the pimples 46 and holes 48 (which fit isdifficult to control) will not result in any misalinement and suchpimples and holes are used mainly to provide a temporary lockmaintaining joint angular movement between the stapling mechanism andthe mounting member. While not essential except for conserving verticalheight, cut-outs 54 may be provided in the bottom and sides 14 toaccommodate the pin 22.

In order to disengage the staple driving mechanism 12 from the base 10,it is only necessary to swing such mechanism upwardly(counter-clockwise) until the mounting member 18 reaches its upperlimit, further upward movement will disengage the lock between the{pimples 46 and the holes 48 and permit the sides 14 to be swung clearof the sides 16 separating the engagement between the notches 50 andstuds 52 and notches 40 and studs 42.

I claim:

1. A desk type stapling machine having a base, a mounting member pivotedto said base and having limited pivotal movement with respect thereto,resilient means for urging said mounting member to a raised positionwith respect to such base between said limits, a staple magazine havinga portion interfitting with said mounting member, staple drivingmechanism carried by said magazine, spaced locking elements on saidmounting member swingable therewith about the pivot of said mountingmember, and angularly spaced locking elements on said portion cooperableWith said spaced locking elements to properly aline said staple drivingmechanism with said mounting member and maintain said mechanism infrictional engagement as so alined.

2. Detachable means for pivotally mounting a staple driving mechanismand a staple magazine to a base, comprising a mounting member pivoted tosaid base, a locking element adjacent one end of said mounting member, acomplementary locking element on the outer end of said staple magazineengageable with said locking element upon endwise movement of saidstaple magazine angularly downward toward said mounting member, africtionally engageable locking element near the other end of saidmounting member, and a frictional locking element on said staplemagazine engageable with said frictional locking element when saidmagazine is properly seated in said mounting member.

3. Detachable means for pivotally mounting a staple driving mechanismand a staple magazine to a base, comprising a mounting member pivoted tosaid base, a locking element adjacent one end of said mounting member, acomplementary locking element on the outer end of said staple magazineengageable with said locking element, a slope on the end of said staplemagazine which upon endwise movement of said staple magazine angularlydownward toward said mounting member guides said locking elements intoengagement, a frictionally engageable locking element near the other endof said mounting member, and a frictional locking element on saidstapling magazine engageable with said frictional locking element whensaid magazine is properly seated in said mounting member.

4. In a stapling machine of the type having staple driving mechanismincluding a magazine detachably removable from a base with which saidmechanism has relative pivotal motion, mounting means comprising amember pivotally secured to said base, spaced locking elements on saidmember, spaced locking elements on said stapling driving mechanismcooperable with said locking elements, said elements arranged in spacedpairs of a cooperative notch and stud, the notch and stud of one pairbeing engageable upon linear movement of said staple mechanism relativeto said mounting member, and the notch and stud of the other pair beingengageable upon angular movement of said stapling mechanism with respectto said mounting member about said pair.

References Cited in the file of this patent UNITED STATES PATENTS2,097,865 Stockel Nov. 2, 1937 2,420,830 Maynard May 20, 1947 FOREIGNPATENTS 383,400 Great Britain Nov. 17, 1932 1,004,065 France Nov. 21,1951

